gameInfo = {
    roomId: null,
    thisUserId: null,
    thatUserId: null,
    isWhite: true,
}
//////////////////////////////////////////////////
// 设定界⾯显⽰相关操作
//////////////////////////////////////////////////
function setScreenText(me) {
    let screen = document.querySelector('#screen');
    if (me) {
        screen.innerHTML = "轮到你落⼦了!";
    } else {
        screen.innerHTML = "轮到对⽅落⼦了!";
    }
}
//////////////////////////////////////////////////
// 初始化 websocket
let webSocket = new WebSocket("ws://localhost:8080/ai");
webSocket.onopen = function () {
    console.log("open");
}
webSocket.onerror = function () {
    console.log("error");
    alert("与服务器断开连接,返回游戏大厅");
    location.assign("game_hall.html");

}
webSocket.onclose = function () {
    console.log("close");
}

window.onbeforeunload = function () {
    webSocket.close();
}

webSocket.onmessage = function (event) {
    let response = JSON.parse(event.data);
    if (!response.ok) {
        alert("游戏连接异常");
        location.assign("game_hall.html");
    }
    if (response.message != "游戏开始") {
        console.log("响应错误");
        return;
    }
    gameInfo.roomId = response.roomId;
    gameInfo.thisUserId = response.thisUserId;
    gameInfo.thatUserId = response.thatUserId;
    gameInfo.isWhite = (response.whiteUserId == response.thisUserId);
    initGame();
}
//////////////////////////////////////////////////
// 初始化⼀局游戏
//////////////////////////////////////////////////
function initGame() {
// 是我下还是对⽅下. 根据服务器分配的先后⼿情况决定
    let me = gameInfo.isWhite;
    setScreenText(me);
// 游戏是否结束
    let over = false;
    let chessBoard = [];
//初始化chessBord数组(表⽰棋盘的数组)
    for (let i = 0; i < 15; i++) {
        chessBoard[i] = [];
        for (let j = 0; j < 15; j++) {
            chessBoard[i][j] = 0;
        }
    }
    let chess = document.querySelector('#chess');
    let context = chess.getContext('2d');
    context.strokeStyle = "#BFBFBF";
// 背景图⽚
    let logo = new Image();
    logo.src = "image/五子棋.jpg";
    logo.onload = function () {
        context.drawImage(logo, 0, 0, 450, 450);
        initChessBoard();
    }
// 绘制棋盘⽹格
    function initChessBoard() {
        for (let i = 0; i < 15; i++) {
            context.moveTo(15 + i * 30, 15);
            context.lineTo(15 + i * 30, 430);
            context.stroke();
            context.moveTo(15, 15 + i * 30);
            context.lineTo(435, 15 + i * 30);
            context.stroke();
        }
    }
// 绘制⼀个棋⼦, me 为 true
    function oneStep(i, j, isWhite) {
        context.beginPath();
        context.arc(15 + i * 30, 15 + j * 30, 13, 0, 2 * Math.PI);
        context.closePath();
        var gradient = context.createRadialGradient(15 + i * 30 + 2, 15 + j *
            30 - 2, 13, 15 + i * 30 + 2, 15 + j * 30 - 2, 0);
        if (!isWhite) {
            gradient.addColorStop(0, "#0A0A0A");
            gradient.addColorStop(1, "#636766");
        } else {
            gradient.addColorStop(0, "#D1D1D1");
            gradient.addColorStop(1, "#F9F9F9");
        }
        context.fillStyle = gradient;
        context.fill();
    }
    chess.onclick = function (e) {
        console.log(over);
        if (over) {
            return;
        }
        if (!me) {
            return;
        }
        let x = e.offsetX;
        let y = e.offsetY;
// 注意, 横坐标是列, 纵坐标是⾏
        let col = Math.floor(x / 30);
        let row = Math.floor(y / 30);
        if (chessBoard[row][col] == 0) {
// TODO 发送坐标给服务器, 服务器要返回结果
            send(row,col);
        }
    }
// TODO 实现发送落⼦请求逻辑, 和处理落⼦响应逻辑.

    function send(row,col) {
        console.log("send");
        let request = {
            message:"落子",
            userId:gameInfo.thisUserId,
            row:row,
            col: col
        };
        webSocket.send(JSON.stringify(request));
    }

    webSocket.onmessage = function (event) {
        let response = JSON.parse(event.data);
        if (response.message != "落子") {
            console.log(response.message);
            console.log("响应错误");
            return;
        }
        console.log(response);
        if (response.userId == gameInfo.thisUserId) {
            oneStep(response.col,response.row,gameInfo.isWhite);
        }else if (response.userId == gameInfo.thatUserId) {
            oneStep(response.col,response.row,!gameInfo.isWhite);
        }else {
            console.log("落子响应错误,response = "+JSON.stringify(response));
            return;
        }

        chessBoard[response.row][response.col] = 1;
        me = !me;

        if (response.winner != 0) {
            if (response.winner == gameInfo.thisUserId) {
                alert("你赢了!");
            }else {
                alert("你输了");
            }
            location.assign("game_hall.html");
        }
        setScreenText(me);
    }
}